I write a c# windorm application and generate a install file, when I finish the installation, every time I double click the shortcut in desktop, it will open a new window, does anyone can tell me how could I just open the original window when I double click the shortcut in desktop?
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- possible duplicate of this which is a duplicate of What is the correct way to create a single instance application?Pierre-Luc Pineault– Pierre-Luc Pineault2014-04-28 05:33:24 +00:00Commented Apr 28, 2014 at 5:33
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I prefer a mutex solution similar to the following. As this way it re-focuses on the app if it is already loaded
using System.Threading; [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool SetForegroundWindow(IntPtr hWnd); /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { bool createdNew = true; using (Mutex mutex = new Mutex(true, "MyApplicationName", out createdNew)) { if (createdNew) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new MainForm()); } else { Process current = Process.GetCurrentProcess(); foreach (Process process in Process.GetProcessesByName(current.ProcessName)) { if (process.Id != current.Id) { SetForegroundWindow(process.MainWindowHandle); break; } } } } } It gives focus to your application window if it is already running.
